how to type \r\n under bash

quick question

[Xuefer]

i wanna type control chars
\r not the \ and r itself
thx

[bird]

You can type in control chars if you type a ^V (ctrl-V) first. So in you case, the following will print an empty line:

$> echo '^V^R'

[/code]
[code]$>

(You won't actually see the ^V on screen anymore after typing the ^R)

[Xuefer]

got it
^V^J^V^M
right? :)

[littleman]

Gotta ask...why do you need to do this?

[bird]

got it
^V^J^V^M

Actually, if you're trying to emulate DOS line endings, you'll probably want to reverse that. At least with my terminal settings, ^J ~= \n, and ^M ~= \r.
Other than that, you seem to be on the right track.

[Xuefer]

thx bird

grep -n '^V^M^V^J' *.txt
scan for dos text :)

u have better way to do it?

[bird]

Have a look at the file command:

$> file some.txt
some.txt: ASCII text, with CRLF line terminators

It won't scan through the full text, so it may miss files where the line endings are mixed, but it's usually quite reliable for uniform files.

[Xuefer]

nice :)
but
[Administrator@my abc]$ file a.php
a.php: PHP script text

:(